Legal analysis: that is, notaries participate in the proof of the purchase process, such as taking notaries to shopping malls to buy infringing products and placing orders with infringing manufacturers under the witness of notaries, so as to determine the effectiveness of relevant evidence in litigation.

Legal basis: Notary Law of People's Republic of China (PRC).

Article 36 notarized civil legal acts, facts and documents with legal significance shall be used as the basis for ascertaining facts, unless there is evidence to the contrary that can overturn notarization.

Article 37 If the debtor fails to perform or improperly performs the notarized creditor's rights document with payment as its content and stating that the debtor is willing to accept the commitment of enforcement, the creditor may apply to the people's court with jurisdiction for enforcement according to law.

If the creditor's rights documents specified in the preceding paragraph are indeed wrong, the people's court shall rule that they shall not be executed, and serve the ruling on both parties and the notary public.